by Sgt Seubert » 24 Sep 2012, 13:23
also sounds like who ever rebuilt this engine may not have paid attention and put the intake manifold gaskets in wrong. there should be a block off plate incorporated with the intake manifold gaskets, they go on the rear most ports on the heads. easy test is pull the top hose off and see if coolant comes out of the water neck for the thermostat housing. this is one of those many different conditions can cause it to do this. all good comments from the mech's, just hoping to add something to the mix